What coefficient of O2 is needed to balance the equation C3H8 + O2 - > 3CO2 + 4H20?

a. 2

b. 3

c. 5

d. 6

Which statements describe properties of stars? Check all that apply Stars produce energy through nuclear fusion. Stars produce energy through gravity. Stars are massive objects composed of gas. Stars are solid objects that we could stand on.

What is the sum of the coefficients of the following balanced chemical equation? KI + Pb (NO3) 2 → KNO3 + PbI2 A) 6 B) 10 C) 18 D) 20

What would be the resulting molarity of a solution made by dissolving 31.3 grams of Ca (OH) 2 in enough water to make a 1050-milliliter solution? Show all of the work needed to solve this problem.

how many grams of iron will be required to release all the antimony from 10 grams of antimony trisulfide? iron 2 sulfide is also formed

Would precipitation occur when 500 ml of a 0.02 m solution of agno3 is mixed with 500ml of a 0.001M solution of nacl? explain

2. An automobile tire has a pressure of 210 kPa at 293 K. What will be the tire pressure after driving, if the tire temperature rises to 308 K?

Students measuring the mass of a rock record 6.759 g, 6.786 g, 6.812 g, and 6.779 g. Which other measurement of the block's mass would be most precise? A. 6.702 g B. 6.781 g C. 6.605 g D. 6.858 g

What two elements make up dihydrogen monoxide?

What did scientists observe using the earliest microscopes

Which statement describes the redox reaction that occurs when an object is electroplated? A. It is spontaneous and requires an electric current. B. It is spontaneous and produces an electric current. C.